need an option like "--r3mix" from lame.

I'd like to see a "preset" quality option like LAME's "--r3mix"
<http://r3mix.net/> so that I could feel confident that I am getting
the minimum VBR with no detectible audio difference from the .wav that I'm
encoding from (transparency).

If I can't get any guarantees better than "Most people seeking
very-near-CD-quality audio encode at a quality of 5 or, for lossless stereo
coupling, 6.", then I'm likely to not use ogg vorbis for archiving in favor of
continuing to use "lame --r3mix", if only because I have no desire to
continually re-encode my archived CD collection when I find an example where
oggenc encoded just below the "threshold of transparency".